Shredded Hard Stems of Pruning Litters Supported the Growth of Young Tea Plants by Supplementing Nitrogen in Soil: Evaluating Suitable Combination of Urea and Prunings

Pramanik, Prabhat; Phukan, Manabjyoti; Goswami, Anup Jyoti

doi:10.1080/00103624.2018.1431266

Cited by 2 publications

(2 citation statements)

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“…The content of lignin, cellulose, and hemicellulose in PTB is high, which possesses abundant functional groups and is difficult to degrade. Through composting, TPPs and other nutrients can be recycled and utilized as effective soil conditioners to manage soil sickness (Pramanik et al., 2018). Besides, through thermal–chemical transformation, these primary metabolites, along with phenolic compounds, can be developed as a cheap, efficient, and environment‐friendly adsorbent, serving as a strong affinity for heavy metal ions in soil (Han et al., 2021).…”

Section: Research Perspectivesmentioning

confidence: 99%

“…As regular pruning is thought to be one of the most popular and practical techniques for high yield and quality of tea plants, tea gardeners allow tea plants to grow with basic trimming before winter. The amounts of induced pruned tea biomass (PTB, main form of abandon‐plucked tea) per hectare reach 1.42–1.62, 1.98–2.46, and 4.18–6.02 t for light, moderate, and rejuvenation pruning, respectively (Pramanik et al., 2018). China annually generates approximately one million tons of wasted pruned tea branches (Han et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

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Pruned tea biomass plays a significant role in functional food production: A review on characterization and comprehensive utilization of abandon‐plucked fresh tea leaves

Liang,

Gao,

Granato

et al. 2024

Comp Rev Food Sci Food Safe

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Tea is the second largest nonalcoholic beverage in the world due to its characteristic flavor and well‐known functional properties in vitro and in vivo. Global tea production reaches 6.397 million tons in 2022 and continues to rise. Fresh tea leaves are mainly harvested in spring, whereas thousands of tons are discarded in summer and autumn. Herein, pruned tea biomass refers to abandon‐plucked leaves being pruned in the non‐plucking period, especially in summer and autumn. At present, no relevant concluding remarks have been made on this undervalued biomass. This review summarizes the seasonal differences of intrinsic metabolites and pays special attention to the most critical bioactive and flavor compounds, including polyphenols, theanine, and caffeine. Additionally, meaningful and profound methods to transform abandon‐plucked fresh tea leaves into high‐value products are reviewed. In summer and autumn, tea plants accumulate much more phenols than in spring, especially epigallocatechin gallate (galloyl catechin), anthocyanins (catechin derivatives), and proanthocyanidins (polymerized catechins). Vigorous carbon metabolism induced by high light intensity and temperature in summer and autumn also accumulates carbohydrates, such as soluble sugars and cellulose. The characteristics of abandon‐plucked tea leaves make them not ideal raw materials for tea, but suitable for novel tea products like beverages and food ingredients using traditional or hybrid technologies such as enzymatic transformation, microbial fermentation, formula screening, and extraction, with the abundant polyphenols in summer and autumn tea serving as prominent flavor and bioactive contributors.

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Section: Research Perspectivesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%